Oprah gave Microsoft Surface some props on Twitter…using an Apple iPad. Awkward.

“Gotta say love that SURFACE! Have bought 12 already for Christmas gifts. #FavoriteThings,” the talk show host tweeted to more than 14.8 million followers on Nov. 18.

The controversial tweet, noticed by Zagg and The Next Web early on, has received more than 400 “retweets” and more than 170 “favorites.”

Screengrab from TweetDeck

She tweeted some of her favorite things about Surface to a fan — also using Twitter for iPad: “@bmartin2011 they’re different. Picture seems #sharper on Surface. #FavoriteThings” and “@bmartin2011 also keyboard easier for me on Surface. #FavoriteThings”.

It is unclear whether the talk show host herself wrote the message or whether someone else was managing her account from an iPad. Twitter clients have revealed the gaffe — or “#Twitfail” as they say in the Twitterverse — because their metadata usually notes which devices or apps users are using when they tweet.

Microsoft Surface made Oprah’s 2012 list of her “Favorite Things,”alongside other tech items like the high-definition TV Bose VideoWave II and the Jetson E-Bike. She praised the tablet: “The Surface, Microsoft’s first tablet, feels like a Mercedes-Benz to me, people!”

CNET points out that Apple’s iPad was her favorite thing ever in 2010: “from our very first moment together, I knew it had stolen my heart,” she exclaimed, dancing around an iPad with angel wings that was hanging from the ceiling. Looks like Oprah’s technology preferences are changing as fast as technology is evolving.